I made the mistake of getting just okay sounds for the boat last year (2012 v226). i was unhappy with the tower speakers. so i sold everything and started over. I just installed 4-rev10s to 2-Syn4s, another syn 4 to the 6 - kicker cabin speakers, Alpine Type-X 10 with a syn 1 amp all going to the ws420. I could not be happier. it sounds awesome.

You couldn't run four tower speakers if you bridge, obviously, but you could run 2x rev410s on 585w ea, and that'd sound good. Can you run four channels bridged to two channels and then leave two channels full range? If so, what about running it like this: